You can capture video of your desktop with Grabilla.
Just check Video mode checkbox and Grabilla will capture video instead of picture.
You can select an area for video capturing or capture entire desktop.
After that you can config recording quality and select voice recording options.
Choices are: Low Quality (~2 Mb/min), Normal quality (~5 Mb/min), or Custom framerate for capturing.
After pressing big blue button you will see red blinking border around capturing area.
When you want to stop video capturing you had to click on this floating button in top right corner.
After you press Stop button, you can decide what to do with this captured video - Upload to server for quick sharing with your friends, or just Save to file for later editing.
If you select Upload to server, progress bar will appear and you can watch your video uploading progress.
After upload will be finished, you will see the link to your uploaded video in new browser window.
Source: Grabilla FAQ - How to capture video of desktop?